Editorial Type:
Article Category: Research Article
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Online Publication Date: 01 Mar 1993

Response of Citrus (Citrus spp.) Rootstock Seedlings to Soil-Applied Herbicides

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Page Range: 39 – 40
DOI: 10.24266/0738-2898-11.1.39
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Abstract

A greenhouse study was conducted to evaluate the response of Carrizo citrange [Citrus sinensis (L.) Obs. × Poncirus trifoliata (L.) Raf.], Cleopatra mandarin (C. reticulata Blanco), sour orange (C. aurantium L.), and Swingle citrumelo [C. paradisi Macf. × P. trifoliata (L.) Raf.] citrus rootstock seedlings to multiple applications of Premier (fluometralin), Dual (metolachlor), Devrinol (napropamide), Solicam (norflurazon), Surflan (oryzalin), Prowl (pendimethalin), and Treflan trifluralin). The citrus rootstock responses ranged from a 11% reduction in shoot weight of sour orange with Treflan (trifluralin) to a 19% reduction in fibrous root weight of Swingle citrumelo with Surflan (oryzalin). Cleopatra mandarin was tolerant to all the seven herbicides. Dual (metolachlor), Devrinol (napropamide), Solicam (norflurazon), and Premier (fluometralin) were not phytotoxic to all four rootstocks.

Keywords: Carrizo citrange; cleopatra mandarin; sour orange; Swingle citrumelo; tolerance; weed control; Carrizo citrange [Citrus sinensis (L.) Obs. × Poncirus trifoliata (L.) Raf.]; Cleopatra mandarin (C. reticulata Blanco): sour orange (C. aurantium L.); Swingle citrumelo [C. paradisi Macf. × P. trifoliata (L.) Raf.]; Premier (fluometralin), 2-chloro-N-[2,6-dinitro-4-(trifluoromethyl) phenyl]-N-ethyl-6-fluoroben-zenemethanamine; Dual (metolachlor), 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methlethyl) acetamide; Devrinol (napropamide), N,N-diethyl-2-(1-naphthalenyloxy)propanamide; Solicam (norflurazon), 4-chloro-5-(methylamino)-2-(3-(trifluoromethyl)phenyl)-3 (2H)-pyridazinone; Surflan (oryzalin), 4-(dipropylamino)-3,5-dinitrobenzenesulfonamide; Prowl (pendimethalin), N-(1-cthylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine; Treflan (trifluralin), 2,6-dinitro-N,N-dipropyl-4-(trifluroe-methyl)benzenamine
Copyright: Copyright, All Rights Reserved 1993

Contributor Notes

Florida Agricultural Experiment Station Journal Series No. R-02549. The authors acknowledge Southern Citrus Nurseries, Dundee, FL for providing seedlings. Technical assistance of Mr. Gary Test is greatly appreciated.

2Research Associate and Professor, respectively.

Received: 21 Jul 1992
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